>>32793793Level your pokémon to level 66 first; that doesn't take long at all.
You need 2x 5* Rare Kitchens and 2x Rare Candies. (you can do it with one Rare Kitchen but it will take longer)
Take your level 66 pokémon to the first Rare Kitchen and have the rare dinner to get to Lv73, then go to the other rare kitchen and have the other rare dinner to get to Lv80. Now have the rare buffet to get to Lv89, then go back to your other Rare Kitchen and have the other rare buffet to get to Lv98. Finish of the last two levels with the rare candies.
Remember, you have to do it rare dinner>rare dinner>rare buffet>rare buffet You can't do rare dinner then rare buffet as then you'll be over the max level allowed to have the other rare dinner.
Once you are already level 66 this process of getting to Lv100 takes 2 minutes, provided you have the rare kitchens and FC needed already.